That indeed is an 1985 300SD with a 5 cylinder turbodiesel. The lights are the standard US models for that year. In 1986 they changed to the more 'flush' style with cute little wipers.

I have not listed a car on ebay in a while, but when I last did I don't beleive there was an option of "5 cylinder" when picking from the listing options.

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‘84 300TD “Mountain Goat”
'62 300d Adenauer-350 Chevy - "Max"
'15 VW Passat TDI
'16 Dodge Ram 3500 - Cummins w/6-speed
'68 Mustang fastback
'55 T-bird
‘63 Studebaker Hawk